What Is HDBaseT?

Black Box Explains

HDBaseT is a connectivity standard for the distribution of uncompressed HD multimedia content. HDBaseT technology converges full HD digital video, audio, 100BaseT Ethernet, power over cable, and various control signals through a single LAN cable. This is referred to as 5Play™, a feature set that places HDBaseT technology above the current standard.


HDBaseT delivers full HD/3D and 2K/4K uncompressed video to a network of devices or a single device (point-to-point). HDBaseT supports all key HDMI 1.4 features, including EPG, Consumer Electronic Controls (CEC), EDID, and HDCP. The unique video coding scheme ensures the highest video quality at zero latency.


As with the video, HDBaseT audio is passed through the HDMI chipset. All standard formats are supported, including Dolby Digital, DTS, Dolby TrueHD and DTS HD-Master Audio.


HDBaseT supports 100Mb Ethernet, which enables communications between electronic devices including televisions, sound systems, computers, and more. Additionally, Ethernet support enables access to any stored multimedia content, such as video or music streaming.


HDBaseT's wide range of control options includes CEC, RS-232 and infrared (IR). IP control is enabled through Ethernet channel support.


The same cable that delivers video, audio, Ethernet and control signals can deliver up to 100 watts of DC power. This means users can place equipment where they want to, not just locations with an available power source.

HDBaseT Architecture

HDBaseT sends video, audio, Ethernet and control signals from the source to the display, but only transfers 100Mb of data from display to source (Ethernet and control data). The asymmetric nature of HDBaseT is based on a digital signal processing (DSP) engine and an application front end (AFE) architecture.

HDBaseT uses a proprietary version of Pulse Amplitude Modulation (PAM) technology, where digital data is represented as a coding scheme using different levels of DC voltage at high rates. This special coding provides a better transfer quality to some types of data without the need to "pay" the protecting overhead for the video content, which consumes most of the bandwidth. HDBaseT PAM technology enables the 5Play feature-set to be transmitted over a single 330-foot (100 m) CATx cable without the electrical characteristics of the wire affecting performance.

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